Muffler



Patented oct. 21, 1924. 1,512,859l

UNITED sTATEs PATENT OFFICE..

HERBERT S. POWELL, F UTICA, NEW YORK.

MUFFLER.

Application led July 17, 1919` Serial No. 311,574. y

Toallwhomitmag/ concern: The cups 3, 4 and 5 are made of drawn Be itknown that I, HERBERT S. POWELL, metal and are each provided with an anacitizen of the Unitedv States, residing at nular shoulder at 7 formed bythe inden- Utica, in the county of Oneida and State of tation of thelower edgev thereof. The New York, have invented certain new andshoulder 7 so formed provides a seat for the 50 useful Improvements inMuilers, of which upper edge of the next adjacent cup, wherethe followinis a specification, reference by the whole will fit together in an airtight being had t erein to the accompanying manner and make a flushouter surface for drawing. the muilier. The cups form a plurality of 10My invention relates to a muiiler and I chambers for the diffusion ofthe exhaust. 65 declare the following tobe a full, clear, com- The topplate -1- has a depending ange plete and concise description thereofsuffi- 9 adapted to orm a shoulder for assembling cient to enable anyoneskilled in the art to the adjacent edge of the rst cup 3. Likewhich itappertains to make and use the wise the bottom plate 2 has a llange 10to i same, reference being had to the accompanyform a shoulder forassembling the adjacent 70 ing drawings in which like reference charedgeof the ring 11 that is used to help make actefrs refer to like partsthroughout the the final chamber. The bottom plate 2 has specification.y made integral therewith a conduit 12 for The object of the inventionis to construct the escape of the exhaust to the outer at- I0 a muierthat will be strong, durable and mosphere. 75

eicient for deadening the sound caused by The top and bottom plates 1and 2 and the exhaust of an explosive engine. To this each. of the cups3, 4 and 5 have apertures end the muiiler is equipped with a pluralityfor the projection therethrough of the rods of sections made of cupsthat have aper- 6. It will be observed, however, that the tures disposedin the bottom plates thereof. apertures for the projection of the rods 680 These apertures are arranged to compel the alternate between smalland large ones, as exhaust to take a tortuous course through 14 and 15.`The small apertures 14 are the muliler, whereby to break up the forceof adapted to fit snug around rods 6 to said exhaust as it comes fromthe engine thereby aid in holding the whole series of U0 and therebypermit it to escape to the open cups more rmlytogether, so as to prevent85 atmosphere unaccompanied by a terrific any rattling, whereas thelarge apertures 15 sound. Furthermore, the object is to tit the assistthe progress of the gases through the sections in an air tight mannerand with a muler and, moreover, are sufliciently large,

flush outer surface. so that the cups do not make contact with Theobject will be understood by referrods 6. Therefore, the contraction andex- 00 ring to the drawings in which: pansion of cups having apertures15 will not Fig. 1 is an elevation of the muier; f bend rods 6. Fig. 2is a vertical central section of the The gases of explosion enter themuler same; lby way of the opening 16 and progress Fig. 3 is a top planview of the muflier; through the same in a tortuous course 05 Fig. 4 isa top plan view of one of the which is eected by the arrangement of thecu s employed; apertures in the bottoms of the several cups ig. 5 is atop plan view of another cup 3, 4 and 5. Each of the cups 3 is providedemployed, showing a different arrangein the base thereof with a largecentral aper- 65 ment ofthe aperture in the bottom thereof; ture 17 andwith small peripheral apertures 100- Fig. 6 is a top plan view of stillanother 18, usually twenty-seven in all, as shown in eup employed,showing a still different ar- Fig. 4. Each of the cups 4 has a set ofrangement of the apertures in the bottom small apertures 19 disposed inconcentric thereof. circles, as shown in Fig. 6. Each of the Referringmore particularly to the mufcups 5 has a large central aperture 20, as105 ler, the top late 1s represented by -1--, shown in Fig. 5. thebottom plate by 2 and the intermediate The progress of the gases ofexplosion cups by 3, 4 and 5.. The parts are held tothrough the mutlleris shown by the dotted gether by stay rods 6-6, twol usually being linesin Fig. 2, and is uniform through the Il sucient. first four chambers orcups 3, where it passesv 11o through the central apertures 17 and thesmall peripheral apertures 18, until said gases reach the fifth chamberor cup 4 which has small lconcentric apertures 19 and no large centralaperture 'as 20, thereby causing the more complete diffusion of thegases throughout its chamber. On reaching the lnext chamber or cup 5,which has only a large central aperture 20, the gases come together topass therethrough. The next chamber which is made of another cup 4: has

the concentric apertures 19 that again cause- From the last e the loweredges of said sections to form seats for the upper edge of the nextadjacent section, to form an air tight joint, end members having annularflanges for' fitting said sections thereto, large central apertures madein the first four sections to permit the expansion of the gases, smallperipheral and large central apertures in others, alternating with smallconcentric apertures in still others, and said sections so arran ed thatthe large central apertures are uni orm for the first four sections toallow for the expansion and for the alternate contraction and expansionthrough the others, whereby the gases will take a tortuous course,headed \stay rods bolted at one end Jfor holdind the sections togetherand said stay rods adapted to project through certain of said peripheralapertures that alternate between clos and loose fitting to said stayrods.

In testimony whereof l have alixed my signature.

HERBERT S. POWELL.

